ARP Perma-Loc Rocker Arm Adjuster - For Stamped Steel Rocker Arms - 7/16"-20 Thread 57341111 GMC: Sierra 1500 19 -

GMC: Sierra 1500 19 - 19 AT4

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ARP Perma-Loc Rocker Arm Adjuster - For Stamped Steel Rocker Arms - 7/16"-20 Thread 57341111 GMC: Sierra 1500 19 -A rocker arm adjuster that doesn't require special tools and won't work loose. Threads on the heat treated Perma Loc Adjusters are machined exactly perpendicular to the adjuster bottom. a set screw is also machined flush on the bottom. All of these features help eliminate setting valve lash on a regular basis. ARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline.